Today is the Hubble Space Telescope's birthday — it's been exactly 24 years since it was launched into orbit. The optical telescope captures drop-dead gorgeous images of space, and is a constant source of both new science and new computer wallpapers.

Discovery released Hubble into orbit on April 25th, 1990. Image credit: NASA

The first photos back from Hubble were underwhelming. A crucial flaw in the main mirror was producing fuzzy images, breaking the hearts of astronomers everywhere.

Servicing mission 1 to install corrective optics. Image credit: NASA

After ground-based modelling and testing, corrective optics were developed to compensate for the mirror. The first service mission to the Hubble installed these optics — yes, that means the Hubble Space Telescope wears glasses. After that, it was beautiful picture after beautiful picture, in a stream of breathtaking astronomy.

Later servicing missions added additional instruments, and replaced gyroscopes and batteries. A final servicing mission was almost cancelled after the Columbia disaster, but was rescheduled after public pressure to repair the beloved telescope.